The 325 is an awesome, clean , classic design. I have owned both of these cars and have to say that both have a lot to offer where the straight e30 is often overlooked. The 325 is sooooooo clean looking. If you are looking for mods, I would go with hartge, alpina, snitzer stuff, or search hard for factory mtech parts. I know they are out there, just pricey......maybe the euro "s" rear wing. I have heard of this stuff still being available......there was one guy who converted and e30 to an M3 convertible. It is yellow and pics exist somewhere on the web. And another who offered body conversions in the roundel.......I miss my 90 silver "is". Awesome car!

Is there any body kit in the market which convert a 325i into M3 look ?

Turner Motorsport converted a 325iC and a totalled M3 to make an M3 Cabrio replica. Only one of it's kind.. and that's not a cheap body kit.

Steve'87 325iS with those oh-so-beautiful lines

I think KAMEI made one, but that was years ago, but I saw one once in the SF Bay Area. I thought it looked a bit odd. Probably because the owner didn't lower the car.